Program Control

Question 1

Selection statements

Answer 1

If and Switch

Question 2

Iteration Statements

Answer 2

For, While, Do-While Loops

Question 3

Jump Statements

Answer 3

Break, Continue & Return

Question 4

If Statement Syntax

Answer 4

if (condition)
{
      ...
}
else
{
    ...
}

Question 5

If-Else If-Else Syntax

Answer 5

If (condition)
{...}
Else If (condition)
{...}
Else
{...}

Question 6

Switch Statement Uses

Answer 6

Value of an expression is tested against a list of scenarios. When a match is found, that statement sequence is executed.

Enables a program to select among alternatives.

Question 7

Switch Statement Syntax

Answer 7

Switch(expression) {
  case constant1:
      Statement sequence
      break;
   case constant2:
      statement sequence
      break;
   default:
      statement sequence
}

Question 8

Valid types for switch expressions

Answer 8

byte, short, int, char, String

Question 9

Is the default switch statement required?

Answer 9

No, it is optional. No action takes place if all matches fail.

Question 10

Can you nest Switch Statements?

Answer 10

Yes

Question 11

For Loop Uses

Answer 11

Performing a known number of iterations

Question 12

For Loop Syntax

Answer 12

for (initialization; Boolean condition; iteration)
{
statement sequence
}

Question 13

While Loop Uses

Answer 13

An unknown number of iterations

Question 14

While Loop Syntax

Answer 14

While (condition)

statement;

Question 15

Do-While Loop Uses

Answer 15

When at least one iteration is necessary in an unknown number of iterations

Question 16

Do-While Loop Syntax

Answer 16

do {
statements;
}
while (condition);

Question 17

Purpose of Break in a Loop

Answer 17

Force an immediate exit & bypass any remaining code.

Question 18

Where does program control resume after a break?

Answer 18

The next statement following the Loop.

Question 19

Where does program control resume after a break in an inner loop?

Answer 19

The next line in the outer loop.

Question 20

Labeled Break

Answer 20

Expanded break for exiting from a deeply nested set of loops.

Syntax: break label;

The label is the name identifying a block of code.
To name a block: label: {block of code}

Question 21

Continue

Answer 21

Bypass loop control & force an early iteration

Rare.