SPSC SENIOR COMPUTER OPERATOR PAST PAPER 14-01-2025
چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
- The output toggles
- The output is reset to 0
- The output is set to 1
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
In a JK flip-flop, when both J and K inputs are high, the output switches (toggles) between 0 and 1 with each clock pulse.This property makes JK flip-flops ideal for toggle operations in counters.
کس قسم کے حملے میں صارف کو حساس معلومات فراہم کرنے کے لیے دھوکہ دینا شامل ہے؟
- DDoS
- Phishing
- SQL Injection
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Phishing involves deceiving users into revealing sensitive information like passwords or credit card details.It typically uses fake emails, messages, or websites to impersonate trusted entities.
- Brave
- Timid
- Shy
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Timorous means بُزدل
Brave means بہادر
ملٹی تھریڈ والے ماحول میں، تھریڈ سنکرونائزیشن کے بارے میں درج ذیل میں سے کون سا سچ ہے؟
- Thread synchronization is not necessary as threads do not share resources
- Synchronization is handled automatically by the operating system
- Thread synchronization used semaphores and mutexes to prevent race condition
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Synchronization ensures that threads access shared resources safely, avoiding conflicts like race conditions.Tools like semaphores and mutexes are used to control thread access to critical sections.
- Relational
- Key-Value
- Document
- None of these
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Explanation
Relational databases use structured tables and SQL.This making them distinct from NoSQL databases.NoSQL types include Key-Value, Document, Column, and Graph databases.
ویب ہوسٹنگ کے لیے عام طور پر کون سا سروس ماڈل استعمال ہوتا ہے؟
- IaaS
- PaaS
- Saas
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Platform as a Service (PaaS) provides the tools and environment to develop, host, and manage web applications.It abstracts underlying infrastructure.It allowing developers to focus on deployment and scaling.
- 172.16..0 - 172.31.255.255
- 192.168.0.0 - 192.168.255.255
- 169.254.0.0 - 169.254.255.255
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
The range 169.254.0.0 - 169.254.255.255 is reserved for APIPA (Automatic Private IP Addressing), not private IPs defined by RFC 1918.Private IP ranges in RFC 1918 include 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16.
- 110100011
- 110100001
- 100100011
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Convert each hexadecimal digit to its 4-bit binary equivalent:
- 1 → 0001
- A (10 in decimal) → 1010
- 3 → 0011
Combine the binary groups:
1A3 (hex) = 0001 1010 0011 (binary)
Answer: 1A3 (hex) = 110100011 (binary)
- Whatever
- Despite
- However
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Australia has some beautiful parts of the country. However, they also have a lot of dangerous animals.آسٹریلیا کے ملک کے کچھ خوبصورت حصے ہیں۔ تاہم، ان کے پاس بہت خطرناک جانور بھی ہیں۔"However" is used to contrast the beauty of Australia with the presence of dangerous animals.It introduces a contrasting idea while maintaining the sentence's flow.
آپریٹنگ سسٹم کے تناظر میں "کرنل پینک" کیا ہے؟
- A sudden loss of network connectivity
- A failure in data synchronization
- A system crash caused by critical errors in the OS kernel
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Kernel Panic occurs when the operating system kernel encounters an error it cannot recover from.This leading to a system crash.It is often caused by hardware failures, incompatible drivers, or corrupted system files.
