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1.1 The result of the expression 7 MOD 5 + 10 DIV 3: A 2 B 5 C 4 D 5 1.1.2 A digital signature is used … A when someone signs an electronic document - NSC Information Technology - Question 1 - 2017 - Paper 2
Question 1
1.1 The result of the expression 7 MOD 5 + 10 DIV 3: A 2 B 5 C 4 D 5 1.1.2 A digital signature is used … A when someone signs an electronic document. B to identif... show full transcript
Worked Solution & Example Answer:1.1 The result of the expression 7 MOD 5 + 10 DIV 3: A 2 B 5 C 4 D 5 1.1.2 A digital signature is used … A when someone signs an electronic document - NSC Information Technology - Question 1 - 2017 - Paper 2
Step 1
The result of the expression 7 MOD 5 + 10 DIV 3
Answer
To solve this expression, first calculate the modulo and division components:
- Calculate , which yields (since divided by gives with a remainder of ).
- Next, calculate , which yields (since divided by gives with a remainder of ).
- Finally, add the results: .
Thus, the correct answer is D.
Step 2
A digital signature is used …
Answer
A digital signature is primarily utilized to confirm authenticity and integrity of digital messages or documents. It acts as a means of verifying the identity of the sender, making it important for secure communications. Therefore, the correct answer is B.
Step 3
Step 4
A technique used to make electronic communication appear to originate from a legitimate source is known as …
Answer
This technique is known as spoofing, where a communication is disguised as coming from a trusted source. The aim is to deceive the recipient into trusting the source of the communication, making B the right answer.
Step 5
To establish a relationship between two tables in a database, a link must be made from the …
Answer
In a relational database, establishing a link between tables typically involves the use of primary and foreign keys. A primary key in one table serves as a reference to a foreign key in another table. Consequently, the correct answer is D.