PRF192 - Review

Which of the following is not a valid variable name declaration?

• int __a3;

• int __3a;

• int __A3;

• None of the mentioned

Why do variable names beginning with the underscore is not encouraged?

• It is not standardized

• To avoid conflicts since assemblers and loaders use such names

• To avoid conflicts since library routines use such names

• To avoid conflicts with environment variables of an operating system

Which is valid C expression?

• int my_num = 100,000;

• int my_num = 100000;

• int my num = 1000;

• int $my_num = 10000;

• Compile time error

• Hello World! 34

• Hello World! 1000

• Hello World! followed by a junk value

What will be the output of the following C code?

• The compiler will flag an error

• The program will compile and print the output 5

• The program will compile and print the ASCII value of 5

• The program will compile and print FAIL for 5 times

What is the size of an int data type?

• 4 Bytes

• 8 Bytes

• Depends on the system/compiler

• Cannot be determined

• p and q are 4 and 4

• p and q are 4 and 8

• compiler error

• p and q are 2 and 8

Which of the following statement is false?

• A variable defined once can be defined again with different scope

• A single variable cannot be defined with two different types in the same scope

• A variable must be declared and defined at the same time

• A variable refers to a location in memory

• a = 1, b = 1

• a = 2, b = 1

• a = 1, b = 2

• a = 2, b = 2

The while loop can be written as a for loop

• TRUE

• FALSE