How to Add Comments in PHP Code

02:51:00 php tutorial

How to Add Comments in PHP Code

Comments are useful for internal documentation of the code. Comments also helps in debugging of code. In PHP code we can add comments in almost similar way, we add in other programming Languages.

There are two types of Comments In PHP

Single Line Comments

Multi Line Comments

Single Line Comments
Single Line Comments can be added in PHP by using the symbol // before the lines of comment.

For example
<?php
// this is my php code

?>

Multi line Comments
Multi Line comments can be added in PHP code by using combination of / and *.

For example

<?php

/* this php code is

developed by me */

How to Create a Table in Oracle SQL Plus Oracle 10G

02:30:00 SQL Tutorial

How to Create a Table in Oracle SQL Plus Oracle 10G

In this post "How to Create a Table in Oracle SQL Plus Oracle 10G" we will learn how to create a table in Oracle SQL Plus. Before you create table in Sql Plus , you need to decide the name of the table and various columns names and data types of the columns.

Lets us take example of Student table , here you can decide name of the table as student and it could have columns as rollno, name, fees . Data type of rollno column could be either number or char , the data type of name column must be varchar2 type and datatype of fees column must be number.

The general syntax of create table in SQL SQL> create table <table name> ( column1 specification, column2 specification...);
The sql code to create above student table will be like this:

SQL> create table student (rollno number(3), Name varchar2(20), fees Number(8,2));

This way you can create any table in SQL.

Next: Desc Table Command

Wrapping up

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Computer Networking Questions and Answers

In this post Computer Networking Questions and Answers , we are listing frequently asked questions of Computer Networks.This post Computer Networking Questions and Answers helpful for candidates at various level of education as well as for interviews.

………... Layer contains procedure for encryption
……….. Network topology involves use of one single cable over network?
Define congestion
Define cryptography
Define data decryption.
Define encryptography. Discuss its uses in detail.
Define frame relay.
Define framing
Define HOPS.
Define I.P address.
Define LAN
Define MAN
Define MODEM
Define modulation
Define network
Define network or explain its architecture?
Define path factor
Define peer to peer network.
Define protocol
Define protocol. name protocols at transport layer.
Define quality of service in brief.
Define routing. Explain various routing algorithms.
Define sliding window protocol. explain its functioning in detail.
Define switching. explain its types.
Define TCP/IP
Define term congestion.
Define Token Ring
Define untwisted pair.
Define WAN
Describe Co-axial
Describe need and goal of the network
Difference between encoding and decoding
Difference between modulation and demodulation.
Difference between encryption and decryption
Difference between functioning of data link layer and transport layer.
Difference between LAN,MAN and WAN.
Differentiate b/w server based and peer to peer network models
Differentiate between functioning of data link layer and transport layer.
Discuss data link layer design issue in brief?
Discuss the role of Berkeley socket
Expand tcp & udp
Explain 10 BASE 5
Explain 10 baseT.
Explain Co-axial Cables and its types in details
Explain CSMA/CD in detail
Explain different types of cables in detail.
Explain distance vector routing in detail.
Explain forms of switching in details.
Explain framing in Data Link Layer in detail.
Explain functioning of network layer in detail.
Explain functions of session layer.
Explain how data is encrypted
Explain inter networking.
Explain link state routing algorithm
Explain major function of network layer in brief
Explain MODEM
Explain Multiplexers
Explain multiplexing in detail.
Explain OSI reference model in detail.
Explain router.
Explain shortest path routing algorithm in detail
Explain sliding window protocols with help of suitable example.
Explain switches
Explain TCP/IP reference model in detail
Explain the details of address classes of ip addresses.
Explain the function of Router in detail
Explain the functioning of network layer in detail.
Explain the services provided by physical layer to Data Link Layer
Explain the services provided by Data Link Layer to network layer.
Explain the working of switches
Explain the working of MODEM in detail
Explain the working of router.
Explain the working of transport layer in detail
Explain various congestion control method in detail.
Explain various framing techniques used in data link layer
Explain various functions of transport layer
Explain virtual terminal. state the various application layer design issues.
Explain wireless network.
Name different forms of switching.
Name six control(flag) bits of at cp segment
Name the classes of IP addresses
Name the elementary data link protocol.
Name the protocol at transport layer.
The primary function of layer in……
Use of bridges.
What are the advantages of star topology.
What do you mean by quality of service?
What is a hub
What is a repeater
What is a Router
What is barkleys sockets.
What is Check Sum
What is circuit switching
What is commuter network? Discuss needs of computer network.
What is congestion? Discuss measures to control it.
What is crc? explain in detail.
What is functioning of http.
What is functioning of http?
What is functioning of multiplexer.
What is internet?
What is the barkley sockets.
What is the functioning of multiplexer.
What is the side effect of flooding
What is topology? Discuss important design issue designing a topology.
What is use of communication channel?
What is virtual terminal.
What s a network.
Write short notes Congestion
Write short notes on E-mail
Write short notes on data encryption.
Write short notes on Internet Working
Write short notes on virtual terminal

Wrapping Up

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Data Structures and Algorithms Interview Questions and Answers forFresher and experienced

02:46:00 Computer Engineering FAQ

Data Structures and Algorithms Interview Questions and Answers for Fresher and experienced

In this post Data Structures and Algorithms Interview Questions and Answers for Fresher and experienced, we are listing frequently asked questions of Data Structures and Algorithms. This post Data Structures and Algorithms Interview Questions and Answers for Fresher and experienced helpful for candidates at various level of education as well as for interviews.

An address is a …, while pointer is a ……

Complete the term LIFO and FILO

Construct a Binary Tree to represent the infix notation (a=b)*(c+d)-e.

Declaration of single dimensional array.

Define a dequeue

Define a linked list

Define algorithm?

Define Array?

Define Automatic and external variables

Define B Tree .Explain with example Insertion & Deletion of nodes of a B-Tree

Define Binary Tree

Define circular doubly linked list

Define Circular linked lists

Define Circular queue

Define Data Structures and Algorithms

Define data type

Define Debugging

Define Edge of tree

Define Front & real pointer.

Define how you represent a binary tree in memory.

Define leaf nodes and edges.

Define linear queue.

Define linked list.

Define pointer?

Data Structures and Algorithms latest Questions

Define program testing.

Define queue

Define queue and explain its operation with figure

Define Queues. Explain Insertion and deletion of items from a queue.

Define Record.

Define recursion algorithm.

Define searching

Define Sequential search.

Define sorting.

Define traversing a linked list.

Differentiate b/w static memory allocation & dynamic memory allocation.

Differentiate between data object and data structure?

Discuss any four commonly used sorting techniques?

Explain Big 'O' notation for efficiency consideration of sorting techniques.

Explain Binary search technique in detail with algorithm?

Explain Bubble sort algorithm with example?

Explain circular queues

Explain doubly linked list with figure.

Explain how two dimensional arrays is represented in memory?

Explain Insertion sorting technique

Explain insertion, deletion, searching operation of an array.

Explain merge sorting

Explain pointer and pointer variable.

Explain push and pop in stack with a suitable example

Explain quick sorting. Implement it on the following array of elements: 22,29,11,18,34,7,14,46,35,8,56,26

Explain row major order and column mojor order in context with a 2-dimensional array?

Explain Stacks

Explain the concept of de-queue with example.

Explain the concept of pointer with example

Explain the deletion procedure from a binary search tree in detail with suitable example

Explain the differences between one dimensional array and two dimensional arrays, with example.

Explain the four operations performed on an array

Explain the representation of linked lists in memory.

Explain various types of data type in detail.

Data Structures and Algorithms Interview Questions

Explain with diagram how a node n is inserted into a linked list between two nodes.

Find post fix and prefix forms of A*(B+D)/E-F*(G+H/K)

Give difference between algorithm and flow chart

Give the post fix from of the expression: A*(B+(C+D)*(E+F)IG)+H

Give two applications of Linked List?

Give two applications of stacks?

Give two example of non-linear data structure.

Given a linear array A(5:50) B(18) .Find the number of elements in each array

How a linked list can overcome the limitations of array?

How array is implemented in memory & how the address of an element can be calculated in one and two-dimensional array?

How linked list is represented in memory? Explain?

How the binary tree represented in memory?

How two dimensional arrays is stored in memory?

If UB is 15 and LB is -7.Find the length of array?

Implement an algorithm that sorts a matrix row wise and use this algorithm in a program

Infinite recursion

Limitations of linear searching

List the four major operations performed on the linear data structure?

List two application of linked list ?

Name any four sorting techniques.

Name the sort for which time is not proportional to n(square)

Quick sorting technique

State the condition under binary search is applicable?

Suppose an array A contains 8 elements 77,33,44,11,88,22,66,55 sort his array using selection sort technique?

The closing brace of structure is followed by a ………………

Use selection sort algorithm to sort an array with data 7,33,44,11,88,22,66,55

Use selection sort algorithm to sort an array with data:

Using binary search method search number 40 from an array 1,22,30,33,40,44,55,60,66,77,80,88,99

Using bubble sort technique sort an array consisting of elements: 2,51,27,85,66,23,13,57

Using merge sort techniques sort an array containing elements:- 66,33,40,22,55,88,60,11,80,20,50,44,77,30

What are pointer expressions? How it is performed?

What are the three methods of traversing a binary tree? Explain each method

What are the three standard ways to traversing a binary tree?

What are the various traversing techniques? Explain

What do you mean by array?

What do you mean by binary tree? How it is represented in a memory? Explain with the help of example.

What do you mean by iteration? Compare recursion with iteration

What do you mean by overflow and underflow in linked list?

What do you mean by post fix notation?

What do you mean by push operation?

What do you mean by Radix Sort?

What do you mean by searching?

What do you mean by sorting?

What do you mean by Stacks?

What do you understand by a program & what is the role of compiler

What do you understand by debugging?

What do you understand by index or subscript of an array?

What do you understand by recursion? Write a program in 'C' to find the factorial of a number using recursion.

What do you understand by transversal of a tree? Explain in detail?

What is a constant

What is a linear array? How it is represented in memory?

What is a Pointer Variable? How it is declared? Write advantages of using pointers in 'C'.

What is a stack? Explain with example?

What is a structure?

What is a variable?

What is binary tree?

Data Structures and Algorithms FAQ

What is Call By Reference

What is circular queue? Explain in detail.

What is constant?

What is data? Differentiate between primitive and non primitive data structures?

What is doubly linked list? How an element is inserted in a doubly linked list?

What is leaf of tree?

What is linear and non-linear data structure explains with example.

What is linear array? How it is represented in a memory?

What is linear queue? Write a program to illustrate queue operation using array

What is linked list?

What is pointer variable

What is push and pop in stack?

What is radix sort?

What is recursion? Write the conditions when one can have infinite recursion.

What is searching? Write the steps for linear algorithm?

What is single dimensional array?

What is stack? What are the various operations that can be performed on Stack? Expalin with algorithms?

What is structured programming?

What is the significance of external pointer?

Which method is preferred in general recursive method or non recursive method.

Write a 'C' function for concatenating the strings S1 and S2 and storing the resulting string into S1.

Write a program for building factorial of a given number using recursion.

Write a program in "c" to find factorial of number using recursion?

Write a program in C for insertion and deletion of elements in queue using pointers.

Write a program in 'c' for Quick sort technique.

Write a program in C to add two matrices.

Write a program in c to find factorial of a number using recursion

Write a program in C to multiply two matrices.

Write a program that creates double linked list

Write a program which defines the concept of traversing of an array.

Write algorithm for Bubble sort.

Write algorithm for conversion from infix to post fix notation.

Write an algorithm for searching an element in sorted linked list?

Write an algorithm for traversing a linked list

Write an algorithm for traversing a linked list.

Write an algorithm to insert a node at the beginning of a list?

Write an algorithm to multiply two matrices.

Write difference b/w single linked list and doubly linked list

Write formula to calculate length of two dimensional arrays

Write program that reverses a linked list

Write short note on User defined data type.

Write short notes on structured programming

Write short notes on Doubly Linked List

Write short notes on Extended Binary tree

Write short notes on Variable and constant.

Write short notes row major order

Write the difference between single linked list and doubly linked list?

Write the formula for calculating the length of two dimensional arrays?

Write the postfix and prefix forms of:- A=(B+D)/E-F*(G+H/K)

Write the steps for traversing a linear array?

Write the steps used in preorder traversing of tree?

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Top 101 Digital Electronics Interview Questions and Answers for Freshers

The idea behind the post Top 101 Digital Electronics Interview Questions and Answers for Freshers is to give an idea of questions to viewers of this post. Top 101 Digital Electronics Interview Questions and Answers for Freshers are beneficial for students as well as candidates appearing for interviews.

Digital Electronics

Define OR gate?

Draw truth table for two input AND gate?

Define de-multiplexers?

What are shift registers?

What is ring counter?

Define magnitude comparator?

Define Priority encoder?

Draw master slave J-k Flip flop and explain its operation?

Draw the logic diagram of UP/DWON Asynchronous counter and explain its working?

Explain the application of shift registers?

Explain Binary to gray number conversion?

Explain Gray to Binary number conversion?

Explain why NAND gate is called as Universal logic gate?

Explain the function of flip-flop?

What is the key feature of excess-3 code?

Express octal number in binary (7041)

Draw half adder circuit and Explain its operation?

Draw logic diagram of 4 inputs multiplexer and explain its working?

Draw logic diagram of BCD to decimal decoder and Explain its operation?

Draw logic diagram of decimal to BCD encoder and Explain its functions?

Explain the operation of D-Flip flop using truth table and waveforms?

What is binary Number system

What is the application of seven segment Decoder Driver?

What IC is commonly used for seven segment Decoder Driver and Decoder Counter?

Draw the logic symbol and Truth Table for X-OR gate?

What are Universal Gates?

What is the difference between positive logic and Negative logic?

Which number system is generally used for assembly language programming.

What is the difference between Half Adder and Full adder.

What is parity bit.

Draw the diagram for 4-Bit Synchronous Binary Counter. Explain its working with the help of timing diagram.

Draw the diagram for SR Flip-Flop . Explain its working with the help of Truth Table.

Draw the diagram for Full-Adder. Explain its working. Draw the truth table.

Explain why NAND and NOR gates are called Universal Gates.

Implement OR and AND gates using NAND and NOR gates.

What is the difference between combinational and sequential Circuit?

Draw thw symbol for JK Flip-Flop and D- Flip-Flop

Draw the logic symbol and T.T. for NAND gate?

Draw the circuit diagram for HALF ADDER. Explain its working with the help of a truth table.

What is multiplexer. Draw the logic diagram for 8:1 MUX .Explain its working.

Draw the diagram for 7-segment Decoder Driver. Explain its working.

Draw the logic diagram for decimal (0-9) to BCD decoder .Write its application.

Draw the diagram for Master-Salve J-K Flip-Flop. Explain working with the help of truth table.

Draw the diagram for Universal Shift Register. Explain its working.

Define synchronous sequential circuit.

The sum of binary number 1111 and 1001 is…..

A….Flip-Flop uses both positive edge and negative edge of clock for data transfer.

Give two applications of Flip-Flops.

What is meant by modulus of a counter?

What is buffer register.

Differentiate between serial data and parallel data.

Define accuracy of D/A converter.

A D/A converters has a supply voltage of 15v.If the number of bits is 6,What voltage does 1 bit represent.

Design a mode 8 synchronous counter and Explain its working.

Draw a K-Map for the following functions of 4 variables and use it to reduce the function realize the reduce function by using Nand gates.

F=sigma(1,3,7,11,15)+d(0,2,5)

What is Master slave Flip-Flop.

What is Seven segment display.

What is Weighted resistor D/A converter

Convert (10110110) binary to gray code.

Convert (10111011) graycode to binary.

Draw symbol of OR, NOT, AND,NAND,NOR and XOR gates.

Explain full subtracter with neat diagram.

Design a decoder for BCD to Decimal .

Explain Ring counter.

Draw logic diagram of 4 bit parallel in serial out register.

Explain the operation of J-K Flip-Flop.

Design a 6 4:1 MUX using 16:1 and 4:1 MUX

What is parity ?

Draw truth table of OR gate.

What is digitization ?

State Demorgan's first theorem.

Define LATCH.

What is Buffer ?

Find 2's compliment of 11010101.

What is meant by Positive Logic?

What is PISO ?

How many Flip Flops are required for a decade counter?

What is difference between Asynchronous and Synchronous Counter

Draw & Explain Asynchronous MOD-5 counter.

What are application of Shift Registers? Explain SISO Register.

Difference between Analog and Digital signals

What is a Priority encoder

What are error detection codes?

What are universal gates? Why these are called as universal ?

Add these two binary numbers 101010 & 110101.

Draw truth table & schematic of half adder circuit & Explain.

What is basic difference between a multiplexer & an encoder?

Explain 4:1 multiplexer.

Draw block schematic of 2 bit comparator circuit & Explain with the help of truth table.

Using K-map simplify Y= sigma(0,2,3,5,7,11,13) and realize it using NAND gate only.

What is Race-Around condition & how it is eliminated using JK Master Slave Flip-Flop

What is A.L.U?

Explain all modes of shift register & Draw PISO shift register.

What is parity & how it is used in error detection code?

Explain 4 bit parallel binary adder

Draw a BCD to 7-segment decoder?

What is function of stroke in multiplexer? Draw 4:1 multiplexer with truth table.

What is difference between sequential & combinational circuits? Draw logic diagram of mode 7 counter.

What is a flip flop? Show how D-flip flop is made by SR flip flop with truth table.

calculate 2's complement of a decimal no. 16

convert 110101 into decimal no.

subtract 1011 from 1100

Define latch

What is excess-3 code?

What are universal gates?

What are combinational circuits?

What is difference b/w positive and negative logic

Simplify Y=AC-+ABC

Explain all modes of shift register & Draw PISO shift register

Minimize the following expression using K-map & realize using NAND gates only:

f(A,B,C)=[m(0,2,3.5,6,7)

Write short on full adder

Write short on decade counter

Write short on Magnitude comparator

What is parity & how it is used in error code

Define Demorgon’s theorems

Draw truth table & symbol of Ex-or gate

Convert (3ab)16 to decimal number?

What are advantages &application of digital signals

Explain 4-bit parallel binary adder

Draw a bcd to 7-segment decoder

What is function of stroke mux? Draw 4:1 mux with tt.

What is diff. b/w sequential & combinational circuit ? Draw logic Diagram of mode-7 counter ?

What is flip flop

write 2's complement of Number :10011000

which are the universal gates?

Draw the symbol of EX-OR gate

where the karnaugh map is used?

Which Flip flop has race problem

define nibble, byte

Draw the symbol of 3 :1 multiplexer

Define shift register

How much flip flops are required to count 60

Which gates are required to build an half adder?

Explain the working and truth table of edge triggered SR flip-flop

Explain serial in parallel out shift register

What is a Full adder

What is a MOD-8 counter

What is a seven Segment display

Difference between latch and flip flop

Draw the circuit diagram of Binary to Grey encoder?

Discuss the working of the buffer register

Draw the symbol and truth table of NAND Gate and OR gate.

Explain 16-Line multiplexer

Simplify the expression using K-MAP and implement it by using NAND gates only

f(ABCD)-sigma(m)(2,3,6,7,8,9,12,13)+sigma(d)(4,10,14)

Implement all logic gates using NOR gates

Draw logic symbol of Not Gate

Convert (101101)2 into its decimal equivalent

Give example of digital signal

Define a flip flop

What is logic gate

Define a truth table

What is sequential circuit

Solve ABC(bar)+A(bar)BC+BC(bar)

Define a Asynchronous counter

Define about de morgon theorem

Define shift register

What is encoder circuit

Write about AND and OR gate

Explain operation of adder circuit to add 2 bit numbers

Minimize Boolean expression using k-map : F(A,B,C,D)=SIGMA M (0,2,5,7,9,13,14,15)

Describe the working of a decoder circuit with a login diagram

Convert octal to binary number 742

Convert Hexadecimal No. to Octal number B4C5

Describe operation of a S.R. flip flop

Describe working of serial in parallel out shift register

Explain about operation of MOD-5 counter with os logic diagram

Describe the operation of 8 input multiplexer with its logic diagram

Explain the logic diagram of master slave flip flop and give its working

Explain the working of Asynchronous Counter with its truth table

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Top 10 Summer Vacation Spots in the World

03:48:00 Life Skills

Top 10 Summer Vacation Spots in the World

Everyone Plans to visit Hill stations in Summer. What are the Top 10 Summer Vacation Spots in the World ? We have tried to mention Top 10 Summer Vacation Spots in the World in this post as per our point of view.

Mussoorie

Best Holiday Destinations in JUNE 2015

Mussoorie is Famous Hill station in Summer. It is in the state of Uttarakhand, in Dehradoon District.
Mussoorie is more popular by the name Queen of Hills. Mussoorie is at a distance of 34 kms from Dehradun and 2003 meters above sea-level. Mussoorie is popular more in north India as hill station.

Mussoorie gained its fame because of its natural beauty and cool weather. In summer vacations a lot of tourists visits Mussoorie from all over India. It is connected by road dehradun. The hill station is also popular in winters too because of snow fall in the area.

The cool weather and scenic beauty attracts visitor to visit here frequently. There are a lot of hotels in the area , so staying here is not a big issue. There are a lot of shops and eating points at mall road of Mussoorie.

Popular places at Mussoorie

Municipal Garden

Municipal Garden Mussorie

It is also known as Company Bagh. Municipal Garden is located in the Happy Valley area. This Garden us maintained by Garden Association of the destination. It is also known as Botanical Garden. the municipal garden is situated near about 3 kms from the popular library point. There are a lot of flowering plants. You can enjoy the chirping of beautiful colored birds here. Near about 800 species of flowers are planted here. In the municipal garden , there is provision of plants nursery , where you can buy these plants. Lush green carpet of lawns enhances its beauty. One can enjoy boating in the artificial lake here.

Jharipani Fall

It is located near 8 kms from Mussoorie. One can go by car or bus to this beautiful place. Jharipani Fall is near the village Jharipani. The only five star hotel of Mussoorie is also near Jharipani and serves as a landmark.

Bhatta Fall

Bhatta Fall Mussoorie

Bhatta Fall is famous spot near Mussoorie. It is near 7km from Mussoorie city. Bhatta Fall is a natural water fall.

Kempty Fall

Kempty Fall Mussoorie

Kempty Falls are at 13 km from Mussoorie. It is one of the most famous place of Mussoorie. Almost every tourist who visit Mussoorie also visit Kempty Fall.

Other Famous Places Near Mussoorie

Nag Devta Temple
Mussoorie Lake
Jwalaji Temple
Clous End
Naga Tibba
Dhanolti
Surkhanda Devi
Gun Hill
Camel's Back Road

Other Places of interest are listed below :

SHIMLA

KASAULI

KULLU

MANALI

KHAJJIAR

PALAMPUR

NAINITAL

OOTY

MOUNT ABU

Mount Abu

Mount Abu is famous hill station in the state of Rajasthan. Mount Abu is situated in Sirohi District in Aravali Range. It is near the border of Gujrat state.
(we will update this post shorly, thanks for visiting)

How to Add Comments in PHP Code

How to Create a Table in Oracle SQL Plus Oracle 10G

Top 101 PHP Interview Questions and Answers for Freshers and Experienced with Examples

Wrapping up

Top 101 Most Frequently Asked Interview Questions and Answers of Operating System for Freshers and Experienced

Top 101 Most Frequently Asked Interview Questions and Answers of Operating System for Freshers and Experienced

Computer Networking Questions and Answers

Data Structures and Algorithms Interview Questions and Answers for Fresher and experienced

Data Structures and Algorithms latest Questions

Data Structures and Algorithms Interview Questions

Data Structures and Algorithms FAQ

Top 101 Digital Electronics Interview Questions and Answers for Freshers

Top 101 Digital Electronics Interview Questions and Answers for Freshers

Top 10 Summer Vacation Spots in the World

Mussoorie

Popular places at Mussoorie

Municipal Garden

Jharipani Fall

Bhatta Fall

Top 10 Summer Vacation Spots in the World

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