ch456713

What is an lvalue in C?

• A) A label name

• B) A literal constant

• C) An object stored in computer memory

• D) An error message

What does the statement count++ do?

• Sets count to 0

• Increments count by 1

• Multiplies count by 2

• Decreases count by 1

Which of the following is a correct use of assignment chaining?

• i + j + k = 0;

• i == j == k == 0;

• i = j == k = 0;

• i = j = k = 0;

What is the output of

i = 8; j = 4; i *= j++;

printf("%d %d", i, j); ?

• 32 4

• 40 5

• 40 4

• 32 5

Which form of increment returns the incremented value immediately?

• x--

• --x

• ++x

• x++

In a switch statement, what data types can the controlling expression be?

• int, char, enum

• array

• string and float

• float and double

What is the output if grade = 3 ?

switch (grade) { case 4: printf("Excellent"); case 3: printf("Good"); case 2: printf("Average"); case 1: printf("Poor"); case 0: printf("Failing"); }

• GoodAveragePoorFailing

• Good

• GoodAverage

• GoodAveragePoor

Which Unix command is used to move or rename a file?

• cd

• mv

• rm

• cp

What does rm -i do?

• Removes files with confirmation

• Moves files

• Copies files

• Renames files

How can you clear the terminal screen?

• Ctrl + l

• rm screen

• clear + l

• Ctrl + c