Questions on various topics
Posted on December 7, 2009
(Last modified on August 7, 2020)
| 19 minutes
| Kinshuk Chandra
Some questions to start with:
c cpp Data structure java advanced java Operating System Micro processor Electronics questions C questions
What does static variable mean? What is a pointer? What is a structure? What are the differences between structures and arrays? In header files whether functions are declared or defined? What are the differences between malloc() and calloc()? What are macros? what are its advantages and disadvantages?
[Read More]Verbal questions 2
Posted on December 7, 2009
(Last modified on August 7, 2020)
| 3 minutes
| Kinshuk Chandra
1. (a) cheerleaders : pompoms
(b) audience:seats
(c) team:goalposts
(d) conductor:podium
(e) referee:decision
Ans. (a)
2. archipelago:islands::
(a) arbor:bower
(b) garden:flower
(c) mountain:valley
(d) sand:dune
(e) constellation:star
Ans. (a)
3. crow:boastful ::
(a) smirk:witty
(b) conceal:s;y
(c) pout:sulky
(d) blush:coarse
(e) bluster:unhappy
Ans. (a)
4. bracket:shelf ::
(a) hammer:anvil
(b) girder:rivet
(c) strut:rafter
(d) valve:pipe
(e) bucket:well
Ans. (a)
5. taxonomy:classification ::
(a) etymology:derivation
(b) autonomy: authorization
(c) economy:rationalization
(d) tautology:justification
[Read More]Verbal questions - mixture of words
Posted on December 7, 2009
(Last modified on August 7, 2020)
| 2 minutes
| Kinshuk Chandra
1. Depreciation: deflation, depression, devaluation, fall, slump
2. Deprecate : feel and express disapproval,
3. Incentive : thing one encourages one to do (stimulus)
4. Echelon : level of authority or responsibility
5. Innovation : make changes or introduce new things
6. Intermittent : externally stopping and then starting
7. Detrimental: harmful
8. Conciliation : make less angry or more friendly
9. Orthodox: conventional or traditional, superstitious
10. Fallible : liable to error
[Read More]File Handling in c
Posted on December 7, 2009
(Last modified on August 7, 2020)
| 4 minutes
| Kinshuk Chandra
/* Program to create a file and write some data the file */
#include
#include
main( )
{
FILE *fp;
char stuff[25];
int index;
fp = fopen(“TENLINES.TXT”,“w”); /* open for writing */
strcpy(stuff,“This is an example line.");
for (index = 1; index <= 10; index++)
fprintf(fp,"%s Line number %d\n”, stuff, index);
fclose(fp); /* close the file before ending program */
}
FILE * fopen(char * filename, char * mode)
The mode value in the above example is set to ‘r’, indicating that we want to read from the file.
[Read More]Random number generation
Posted on December 7, 2009
(Last modified on August 7, 2020)
| 5 minutes
| Kinshuk Chandra
Understanding how random number generation (RNG) works In java, lets say you wants to generate random number between i to j e.g.
[ i,j ) excluding upper limit. One standard pattern for accomplishing this is:
Min + (int)(Math.random() \* ((Max - Min) + 1)) The java Math library function Math.random() generates a double value in the range [0,1). Notice this range does not include the 1.
In order to get a specific range of values first you need to multiply by the magnitude of the range of values you want covered.
[Read More]General Utilities
Posted on December 7, 2009
(Last modified on August 7, 2020)
| 1 minutes
| Kinshuk Chandra
These all involve the use of the header , which declares a number of types and macros and several functions of general use. The types and macros are as follows:
size_t
Described at the start of this chapter.
div_t
This is the type of the structure returned by div.
ldiv_t
This is the type of the structure returned by ldiv.
NULL
Again, described at the start of this chapter.
EXIT_FAILURE
[Read More]Error handling
Posted on December 7, 2009
(Last modified on August 7, 2020)
| 1 minutes
| Kinshuk Chandra
The standard I/O functions maintain two indicators with each open stream to show the end-of-file and error status of the stream. These can be interrogated and set by the following functions:
#include
void clearerr(FILE *stream);
int feof(FILE *stream);
int ferror(FILE *stream);
void perror(const char *s);
Clearerr clears the error and EOF indicators for the stream.
Feof returns non-zero if the stream’s EOF indicator is set, zero otherwise.
Ferror returns non-zero if the stream’s error indicator is set, zero otherwise.
[Read More]Random access functions
Posted on December 7, 2009
(Last modified on August 7, 2020)
| 3 minutes
| Kinshuk Chandra
The file I/O routines all work in the same way; unless the user takes explicit steps to change the file position indicator, files will be read and written sequentially. A read followed by a write followed by a read (if the file was opened in a mode to permit that) will cause the second read to start immediately following the end of the data just written. (Remember that stdio insists on the user inserting a buffer-flushing operation between each element of a read-write-read cycle.
[Read More]File handling in cpp
Posted on December 7, 2009
(Last modified on August 7, 2020)
| 7 minutes
| Kinshuk Chandra
File I/O with Streams:
Many real-life problems handle large volumes of data, therefore we need to use some devices such as floppy disk or hard disk to store the data.
The data is stored in these devices using the concept of files. A file is a collection of related data stored in a particular area on the disk.
Programs can be designed to perform the read and write operations on these files.
[Read More]Using pointers to break into bytes
Posted on December 7, 2009
(Last modified on August 7, 2020)
| 8 minutes
| Kinshuk Chandra
Eg.1
main()
{
int i = 257;
int *iPtr = &i;
printf("%d %d”, *((char*)iPtr), *((char*)iPtr+1) );
}
Answer:
1 1
Explanation:
The integer value 257 is stored in the memory as, 00000001 00000001, so
the individual bytes are taken by casting it to char * and get printed.
Eg. 2
main()
{
int i = 258;
int *iPtr = &i;
printf("%d %d”, *((char*)iPtr), *((char*)iPtr+1) );
}
Answer:
2 1
Explanation:
[Read More]