# 3i Infotech Placement: Sample Questions 407 - 409 of 1245

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## Question 407

Edit

### Write in Short

Three cards are drawn at random from an ordinary pack of cards. Find the probability that they will consist of a king, a queen and an ace.

### Explanation

Three cards are drawn at random from a pack of 52 cards.

So, probability of sample space,

We are asked to find the probability that card will be a king, a queen and an ace.

We know that there are total 4 kings, 4 queens and 4 aces in the pack of 52 cards.

So, probability of event,

So, probability of getting a king, a queen and an ace

## Question 408

### Question

MCQ▾

For MB memory, the number of address lines required is?

Choice (4)

a.

24

b.

22

c.

11

d.

20

d.

### Explanation

• is memory in bytes accessible using n lines (for byte addressable memory)
• In the questions bytes

• So, the number of address line required is .

## Question 409

Edit

### Describe in Detail

Essay▾

What is a JAR file?

### Explanation

• “JAR” stands for java Archive.
• It is a file format based on the popular ZIP file format and used for aggregating many files into one.
• A JAR file is contains compressed version of class files, audio file, image files- as an aggregation of resources into a single, compressed file.

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